TPS92692 LED Controller with Spread Spectrum …

1 VCTRLTPS92692-Q1 VINVREFFLTSSDMRTCOMPIMONIADJDIM/PWMVCCGA TEISGNDSLOPEOVCSPCSNPDRVRAMP123456789102 0191817161514131211 VINLED +LED LCINCVREFCSSCDMRTCCOMPCIMONRADJ2 RADJ1 RDIM2 RDIM1 RSLPRISCVCCROV1 ROV2 COUTCRAMPRCSQMQDIMDDDIMPADP roductFolderOrderNowTechnicalDocumentsTo ols &SoftwareSupport &CommunityAn IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand , TPS92692 -Q1 SLVSDD9 MARCH2017 TPS92692 , TPS92692 -Q1 High AccuracyLED ControllerWithSpreadSpectrumFrequencyMod ulation11 Features1 V to 65 V Betterthan 4% LEDC urrentAccuracyover 40 C to 150 C JunctionTemperatureRange SpreadSpectrumFrequencyModulationforImpr ovedEMI ComprehensiveFaultProtectionCircuitrywit hCurrentMonitoroutputand OpenDrainFaultFlagIndicator InternalAnalogVoltageto PWMDutyCycleGeneratorfor stand-aloneDimmingOperation Compatiblewith DirectPWMI nputwith over1000:1 DimmingRange AnalogLEDC urrentAdjustInput(IADJ)with over15.

2 1 ContrastRatio IntegratedP-ChannelDriverto enableSeriesFETD immingand LEDP rotection TPS92692 -Q1:AutomotiveQ100 Grade1 Qualified2 Applications TPS92692 -Q1:AutomotiveExteriorLightingAp plications DriverMonitoringSystems(DMS) LEDG eneralLightingApplications Exit Signsand EmergencyLighting3 DescriptionThe TPS92692and TPS92692 -Q1are highaccuracypeakcurrentmodebasedcontroll ersdesignedtosupportstep- rail-to-railcurrentamplifiertomeasureLED currentand spreadspectrumfrequencymodulationtechniq uefor improvedEMI :1rangeis obtainedby varyingthe voltageacrossthe highimpedanceanalogadjust(IADJ) LEDcurrentis achievedby directlymodulatingtheDIM/PWMinputpin with the desireddutycycleor byenablingthe correspondingdutycyclebycomparingit to the optionalPDRV gatedriveroutputcan be usedtodrivean TPS92692 -Q1devicessupportcontinuousLEDst atuscheckthroughthe currentmonitor(IMON) devicesalsoincludeanopendrainfaultindica toroutputto indicateLEDovercurrent, (1)PARTNUMBERPACKAGEBODYSIZE(NOM)TPS9269 2-Q1 HTSSOP(20) (1)

3 For all availablepackages,see the orderableaddendumatthe end of the TypicalBoostLEDD river2 TPS92692 , TPS92692 -Q1 SLVSDD9 : TPS92692 TPS92692 -Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedTableof Contents1 Pin Configurationand Applicationand Deviceand Mechanical,Packaging,and RevisionHistoryDATEREVISIONNOTESM arch2017*Initialrelease. 123456782019181716151413 Thermal PadVINVREFFLTSSDMRTCOMPIMONVCCGATEISGNDS LOPEOVCSPCSN9 IADJ10 DIM/PWM1211 PDRVRAMP3 TPS92692 , MARCH2017 ProductFolderLinks: TPS92692 TPS92692 -Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporated6 Pin Configurationand FunctionsPWPP ackage20-PinHTSSOP withPowerPAD Top ViewPin achievedesiredclosed-loop ( ).

4 Connectdirectlyto the negativenodeof LEDcurrentsenseresistor, (+). Connectdirectlyto the positivenodeof LEDcurrentsenseresistor, PWMdimmingcommandor externalanalogdimmingcommandbetween1 V and 3 V is comparedto the internalPWMgeneratortrianglewaveformto set LEDcurrentduty cyclebetween0% and 100%.WithPWMgeneratordisabled,adirectPWM dimmingcommandcan be appliedto controlthe LEDcurrentduty cycleand analogor PWMcommandis usedto generatean internalPWMsignalthat controlsthe GATEand internalPWMsignalto logiclevellow, turnsoff switching,idlestheoscillator,disconnects the COMPpin, and sets PDRVto VCSP.

5 Connectto VREF whennot ,fm, programmingpin. Connecta capacitortoGNDto set the GNDto disablespreadspectrummodulationof VREF with a resistorto createactivelow fault auto-restarttimercan enabledby directlyconnectingthepin to SS gateof Analogand Powergroundconnectionpin. Connectto circuitgroundto pin to VCCwith a 100-k seriesresistorto set theinternalreferencevoltageto and the currentsensethreshold,V(CSP-CSN)to Thepin can be modulatedby an externalvoltagesourcefrom140 mV to to The LEDcurrentsensedby CSP/CSNinputis reportedas VIMON= 14 ILED RCS. Bypasswith a 1-nFceramiccapacitorconnectedto the switchsenseresistor,RISto set the switchcurrentlimitthresholdbasedon the internal250 mV resistordividerfromoutputvoltageto GNDto set outputovervoltageand gateof externalP-channelMOSFETto implementseriesFET PWMdimmingand fault , TPS92692 -Q1 SLVSDD9.

6 TPS92692 TPS92692 -Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedPin Functions(continued) capacitorto GNDto set the trianglewavefrequencyfor 249-k resistorto GNDto disablethe PWMgeneratorand to set a fixedreferencefor not allowthis pinto Connecta resistorto GNDto set the internaloscillatorcan be synchronizedby couplingan externalclockpulsethrougha seriescapacitorwith a valueof 100 resistorto GNDto set the desiredslopecompensationrampbasedon inductorvalue,inputand Connecta capacitorto GNDto extendthe disabledby shortingthis pin to VCC( V) bias supplypin.

7 Locallydecoupleto GNDusinga ceramiccapacitor(witha F and F). Locatecloseto the Inputsupplyfor the a low-passfilter usinga series10- resistorand 10- nF capacitorconnectedto capacitorcloseto the VREF(5 V) bias supplypin. Locallydecoupleto GNDusinga ceramiccapacitor(witha F and F) locatedcloseto the The GNDpin mustbe connectedto the exposedthermalpad for PowerPADmustbe connectedto PCBgroundplaneusingmultiplevias for goodthermalperformance.(1)Stressesbeyond thoselistedunderAbsoluteMaximumRatingsma y causepermanentdamageto the stressratingsonly,whichdo not implyfunctionaloperationof the deviceat theseor any otherconditionsbeyondthoseindicatedunder RecommendedOperatingConditions.

8 Exposureto absolute-maximum-ratedconditionsfor extendedperiodsmay affectdevicereliability.(2)All voltagesare with respectto GNDunlessotherwisenoted(3)Continuoussust ainingvoltage(4)All outputpins are not specifiedto havean (unlessotherwisenoted)(1)(2)MINMAXUNITI nputvoltageVIN,CSP,CSN , RT, FLT , SS, RAMP,DM, SLOPE,VREF,IADJ CSN(3) (4)VCC,GATE 100 AGATE(pulsed< 20 ns) 500mAPDRV(pulsed< 10 s) 50mASinkcurrentGATE(pulsed< 20 ns) 500mAPDRV(pulsed< 10 s) 50mAOperatingjunctiontemperature,TJ 40150 CStoragetemperature,Tstg165 C5 TPS92692 , MARCH2017 ProductFolderLinks: TPS92692 TPS92692 -Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporated(1)AECQ 100-002indicatesthat HBMstressingshallbe in accordancewith the ANSI/ESDA/JEDECJS-001specification.

9 (2)JEDEC documentJEP155statesthat 500-VHBM allowssafe manufacturingwith a standardESDcontrolprocess.(3)JEDEC documentJEP157statesthat 250-VCDM allowssafe manufacturingwith a PWP(HTSSOP)PACKAGEV(ESD)Electrostaticdis chargeHuman-bodymodel(HBM),per AECQ100-002,all pins(1) 2000 VCharged-devicemodel(CDM),per AECQ100-011 All pins except1, 10, 11, and 20 500 Pins1, 10, 11, and 20 750 TPS92692IN PWP(HTSSOP)PACKAGEV(ESD)Electrostaticdis chargeHuman-bodymodel(HBM),per ANSI/ESDA/JEDECJS-001,all pins(2) 2000 VCharged-devicemodel(CDM),per JEDEC specificationJESD22-C101,all pins(3) (unlessotherwisenoted) ,crankSupplyinput, , SWSwitchingfrequency80800kHz (CLAMP)

10 VTAO peratingambienttemperature 40125 C(1)For moreinformationabouttraditionaland new thermalmetrics,see theSemiconductorand IC (1) TPS92692 TPS92692 -Q1 UNITPWP(HTSSOP)PWP(HTSSOP)20 PINS20 PINSR C/WR JC(top)Junction-to-case(top) C/WR C/W C/W C/WR JC(bot)Junction-to-case(bottom) C/W6 TPS92692 , TPS92692 -Q1 SLVSDD9 : TPS92692 TPS92692 -Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporated(1)All voltagesare with respectto 40 C TJ 150 C, VIN= 14 V, VIADJ= V, VRAMP= 500 mV, VDIM/PWM= 3 V, VOV= 500 mV, CVCC= 1 F, CVREF= 1 F,CCOMP= nF, RCS= 100 m , RT= 20 k , no load on GATEand PDRV(unlessotherwisenoted)(1)PARAMETERTE STCONDITIONSMINTYPMAXUNITINPUTVOLTAGE(VI N)IIN(STBY)Inputstand-bycurrentVPWM= 0 (SW)InputswitchingcurrentVCC= V, CGATE= 1 (VCC)VCC(REG)RegulationvoltageNo (UVLO)SupplyundervoltageprotectionVCCris ingthreshold,VIN= 8 ,VIN= 8 (LIMIT)